Low-IF topologies for high-performance analog front ends of fully integrated receivers

Crols, Jan; Steyaert, Michiel

doi:10.1109/82.664233

Cited by 383 publications

(179 citation statements)

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“…13(b) where we plot the error between the amplitudes responses with filter B as the reference ( output only). The amplitude error is seen to be smaller than 0.2 dB across the entire passband (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19). Fig.…”

Section: Testing Procedures and Measured Resultsmentioning

confidence: 99%

“…The local oscillator (LO) inputs of the mixers are derived by phase shifting a 2.36-GHz LO. As explained in [7], mismatches between the and paths of a complex filter can result in the image signal leaking into the passband. In order to accurately assess the image leak of the actual filter, the and inputs provided by the test setup should be matched to a very high degree of accuracy; otherwise, mismatches in the test setup can cancel/mask mismatches in the actual filter and make the latter appear much better/worse in terms of image leak than it really is.…”

Section: Testing Procedures and Measured Resultsmentioning

confidence: 99%

“…The system has been designed to perform partial channel selection in a 802.11a/Hiperlan2 low-IF [7] receiver. Due to space limita tions, we restrict our attention to the most demanding data rate of 54 Mb/s.…”

Section: Prototype Filter Designmentioning

confidence: 99%

“…5 shows a simplified block diagram of the fabricated system. Weak signals are processed by filter A, which has the largest input gain and, therefore, the best noise performance, medium strength signals are processed by filter B, and strong signals are processed by filter C. Each of the core filters was de signed to implement a complex (or image-reject or polyphase) [7] bandpass transfer function with center frequency MHz and bandwidth 18 MHz. Fig.…”

Section: Prototype Filter Designmentioning

confidence: 99%

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A “Divide and Conquer” Technique for Implementing Wide Dynamic Range Continuous-Time Filters

Palaskas

Tsividis

Prodanov³

et al. 2004

IEEE J. Solid-State Circuits

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Abstract-This paper presents a technique for implementing analog filters with wide dynamic range and low power dissipation and chip area. The desired dynamic range of the filter is divided into subranges, each covered by a different filtering path optimized specifically for this subrange. This results in small admittance levels for the individual filtering paths and correspondingly small power dissipation and chip area. The system provides undis turbed output during range switching, contrary to conventional automatic gain control (AGC)/filter arrangements that generate disturbances every time the gain of the AGC changes. We also report on a low-noise highly linear CMOS transconductor useful for high-frequency applications. A chip implementing the ideas of this paper was fabricated in a 0.25-m digital CMOS process. The intended application of the filter is channel selection in an 802.11a/Hiperlan2 Wireless Ethernet receiver. The chip dissipates 9 mA, occupies an area of 0.7 mm � , and maintains a signal/(noise + IM3 distortion) ratio of at least 33 dB over a 48-dB signal range, with good blocker immunity. This performance represents at least an order of magnitude improvement over existing channel selection filters, even those that do not achieve disturbance-free operation.

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Section: Testing Procedures and Measured Resultsmentioning

confidence: 99%

Section: Testing Procedures and Measured Resultsmentioning

confidence: 99%

Section: Prototype Filter Designmentioning

confidence: 99%

Section: Prototype Filter Designmentioning

confidence: 99%

See 2 more Smart Citations

A “Divide and Conquer” Technique for Implementing Wide Dynamic Range Continuous-Time Filters

Palaskas

Tsividis

Prodanov³

et al. 2004

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

show abstract

“…Instead, alternative receiver structures, like the direct conversion [1,2] and low-IF [1,3,4] architectures, are receiving more and more interest. The analog front-end of these types of receivers is partially based on complex or I/Q signal processing [5][6][7].…”

Section: Introductionmentioning

confidence: 99%